基于植物氧同位素比率的叶片温度研究进展  

A review on leaf temperature based on oxygen isotope ratios of plants

作　　者：黄穗敏 汪旭明 李蕾 巩晓颖 HUANG Suimin;WANG Xuming;LI Lei;GONG Xiaoying(School of Geographical Sciences,Key Laboratory for Humid Subtropical Eco-geographical Processes of Ministry of Education,Fujian Normal University,Fuzhou 350117,China;Key Laboratory for Plant Eco-physiology of Fujian Province,Fuzhou 350117,China)

机构地区：[1]福建师范大学地理科学学院,湿润亚热带生态-地理过程教育部重点实验室,福州350117 [2]福建省植物生理生态重点实验室,福州350117

出　　处：《生态学杂志》2024年第12期3797-3805,共9页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(32201277,32120103005);福建省自然科学基金项目(2023J01289)资助。

摘　　要：叶片温度是影响植物生产力和物质循环的关键因子,是光合作用和呼吸作用模型以及地球系统模型的重要参数。叶片通过气孔调节和形态学性状改变等实现叶温调节,能保持相对适宜光合作用的叶温并避免叶片受到高温胁迫的伤害。基于植物纤维素^(18 )O分馏值(Δ^(18)O_(Cel))的光合加权叶温(T_(L⁃photo))整合了光合作用实际发生时的叶温,T_(L⁃photo)的稳定性表征植物是否进行了有效的叶温调节,然而T_(L⁃photo)与气温的关系存在较大不确定性。文章阐述了叶温调节的生理生态意义和调节机制,介绍了基于Δ^(18)O_(Cel)估算T_(L⁃photo)模型的理论基础、模型推导、测算方法及结果的不确定性,最后指出提高Δ^(18)O_(Cel)-T_(L⁃photo)模型精准度及其在叶片-植株-生态系统尺度T_(L⁃photo)研究的适用性,是未来需加强研究的主要方向。As a key factor influencing plant productivity and material cycling,leaf temperature is an important parameter in photosynthesis and respiration models and earth system models.Leaf controls temperature by regulating stomata and morphological traits,consequently maintains leaf temperature suitable for photosynthesis and prevents leaf from being damaged by high⁃temperature stress.Photosynthesis⁃weighted leaf temperature(T_(L⁃photo))estimated by the fractionation of plant cellulose(Δ^(18)O_(Cel))integrates leaf temperature during photosynthesis.The stability of T_(L⁃photo)indicates the effectiveness of plants in leaf thermoregulation,but the relationship between T_(L⁃photo)and air tem⁃perature remains uncertain.In this review,we discuss the eco⁃physiological significance and mechanism of leaf ther⁃moregulation,with emphasis on the theoretical basis,model derivation,and uncertainty of measurement methods and results of T_(L⁃photo)estimating fromΔ18OCel.We put forward that improving the accuracy ofΔ18OCel⁃T_(L⁃photo)model and its applicability in studying T_(L⁃photo)at different scales of leaf⁃plant⁃ecosystem should be the main direction of further research.

关 键 词：叶片温度调节 光合加权叶温 叶温内稳态 纤维素18O 植物功能性状 

分 类 号：Q945[生物学—植物学]